Ophthalmic mounting



Jan. 25, 1938. E. M. SPLAINE OPHTHALMIC MOUNTING Filed Jan. 15, 1936 INVENTOR I 150:0020 M JPLA/NE Patented t... 25, 1938 UNITED STATES PATENT OFFICE- 2,106,284 .orn'rmmnc Moonrise setts Applicatio January 15, 1936, Serial No. 59,241

14 Claims. (cl. 88-41) This invention relates to improvements in ophthalmic mountings and has particular reference to improved lens holding means and method of making the same.

This application is a continuation in part of my co-pending application Serial No. 744,917 filed September 21, 1934.

One of the principal objects of the invention is to provide an improved lens holding means that will resiliently ease oi the rigidity in the connection of the holding means to the lens, that 'will insure the said holding means returning to its initial aligned position after such easing oil, that will provide means for controlling the ten-- sion of the resilient means during use, that will maintain the connection of the holding means to the lens firm and substantially rigid to prevent looseness and play during the use of the mounting and yet be of such a nature asto relieve shocks and strain .on the lenses when the glasses are dropped or roughly handled and that will eliminate the exactness and accurateness in the fitting of the parts to be connected usually required in mountings of this character in the past.

Anctherobject of the invention is to provide resilient means of the above character'having a plurality of overlying sections, each of which forms a resilient backing support for the adjacent section. and each of which may be of equal or varied resiliency, as desired. Another object is to provide novel means and method of forming the resilient means and of attaching said resilient means to the lens holding means whereby the opposite ends of the resilient means will exert forces on the lens, holding means acting substantially in equilibrium about the connection of the lens holding means to the lens.

Another object is to provide lens holding means of the above character so constructed that the tension of the resilient means may be varied as desired.

Another object is to provide a relatively narrow attachment for the resilient means to the lens holding means in the direction of the edge of the lens whereby the conventional rigid backing shoe usual in prior art structures of this nature is eliminated and the normal pivotal action of the lens holding means on the lens will: be

greatly increased.

. Another object is to provide the backing for edge portions will have substantially line contact with said resilient means when they are flexed.

Another object is to provide the resilient means with relatively straight transversely extending end portions whereby the said resilient means 5 will have substantially line contact with each other and with the lens at their respective ends.

Another object is to provide novel means functioning separately of the lens face engaging portions of the lens holding means'for attaching the 10 resilient means to said lens holding means and for preventing twisting of said resilient means sidewise relative to said lens holding means during use.

Another object is to provide the resilient means 1 nearest the lens with cylindrical shaped end contacts with the edge of the lens whereby a substantial line contact transversely of said edge will exist at different positions of flexing oi the resilient means. 20

Another object is to provide a novel arrange ment whereby the resilient means is spot welded to the lens holding means.

Another object is to provide novel means and method of making lens holding means of the 5 above character.

Other objects and advantages of the invention will become apparent from the following description taken in connection with the accompanying drawing, and it will be understood that many 0 changes may be made in the arrangement of parts, details of construction and methods shown and described without departing from the spirit of the invention as set forth in the accompanying claims. I, therefore, do not wish to be limited to the exact arrangement of parts, details of constructioh and methods -shown and described as the preferred forms only have been shown by way of illustration.

Referring to the drawing: 40

Fig. I is a fragmentary front elevation of an ophthalmic mounting embodying the invention and showing low position straps or lens holding means;

Fig. II is an enlarged fragmentary perspective View of the strap or lens holding means of Fig. I;

Fig. III is a sectional view of said lens strap or holding means; I

Fig. IV is a sectional view taken as on line IV--IV of Fig. 111;.

Fig. V is a sectional view taken on line V-V of Fig. IV;

modified form of spring connecting means and pp r Fig. VIII is a sectional view taken on line VIII-VIII of Fig. VI, and

Fig. IX is a view similar to Fig. VI showing another modified form of the invention.

Much difficulty has been encountered in the past in fitting and securing the lens straps or holding means of rimless type ophthalmic mountings to the lenses so that the said lens holding means will-have relatively free resilient action and yet be prevented from becoming loose and wabbly during use. One of the difiiculties has been that, in most instances in the past, the means employed for resiliently taking up the looseness and play of the lens holding means on the lens depended upon the support of a rigid backing shoe and, due to the restricted size of such devices, were not sufiiciently durable to produce the most desirable structure, that is, the resiliency of the resilient means would soon play out or the solid backing shoe supporting said resilient means would become bent or distorted and permit the parts to loosen and move out of aligned relation with each other during use. This was due primarily to the fact that, inmost instances, the rigid backing shoe, in order to function properly, had to be fitted with the resilient-means so that it would impart a crimping action adjacent the opposite ends thereof when the lens holding means was moved on the lens. This crimping action was adapted to cause the straightening of the resilient means, after such flexing, to return the parts to their initial aligned relation with each other. It is quite apparent that if the rigid backing shoe became bent during use, the device would not function properly.

It, therefore, is one of the primary objects of this invention to obviate the above defects by eliminating the usual rigid backing shoe of lens holding means of this character, and to replace said backing shoe with resilient backing means which will allow the lens holding means a greater pivotal movement on the lens and provide freer acting and more durable shock absorbing cushioning means.

A further object is to increase the normal resilient easing off action of the resilient means and to increase the tendency of said resilient means to return the parts to their initial set after such easing oif.

Another feature is that of providing a novel method of forming and attaching the resilient means to their supporting means so that the said resilient means will not become distorted during said attaching.

A further object is to provide a freer and wider range of flexing than has been usual in the past in devices of this character.

Referring more particularly to the drawing wherein like characters of reference designate like parts throughout the several views, the improved holding means or strap l embodying the invention, as shown in Figures I to 111 inclusive, comprises a portion 2, which when viewed from the front is relatively straight, and has a temple connection 3 adjacent one end thereof and a bifurcated portion 4 adjacent its opposite end. The bifurcations of the portion 4 are adapted to engage with the front and rear surfaces of the 1 lens 5 and are provided with openings aligned with an opening in the lensthrough which attaching means I, such as a screw or other suitable means known to the art, is extended.

The lens holding means I is provided with redirections.

silient means 8 formed of a plurality of sections 9, l0 and II of varying lengths which extend outwardly of both sides of said holding means and provide relatively long free action resilient means having no backing shoe in engagement with the rear thereof for limiting their movement. The lens holding means I is attached to the lens by the connecting means I. The resilient sections 9, III, and II, are provided with aligned attaching openings through which a rectangular projection l2 at the base of the bifurcation of the lens holding means extends and which is headed over to secure the sections to said base. The different sections may be varied in resiliency or may be of the sameresiliency, as desired, with the section 9 more rigid than the section III and the section III more rigid than the section II. The lens holding means in this instance is of such a nature that it may be moved upwardly and downwardly in the plane of the lens about the connecting means I as a center and provides free action shock and strain absorbing meansin both The resilient means IS in this instance also takes up the looseness and play of the connecting means and also acts as shock absorbing means. It also tends to maintain the lens holding means in proper aligned relation with the lens, that is, if deflected upwardly or downwardly about the connecting means I; it will always tend to return to its initial set.

The base of the bifurcation in the rear of the resilient sections 9, III and l l and to which the said resilient means is attached by the projection i2 is relatively narrow in the direction of the length of the resilient means and permits of a long and free flexing action of said resilient means in this direction during use. The conventional rigid backing supports for the edge spring member of prior art resilient type lensholding means of this nature have been omitted and have been replaced by the resilient backing sections 9 and I0 so as to provide a wider range of flexibility. The narrowing of the base of the bifurcation also increases the normal pivotal movement of the lens holding means on the lens thereby allowing more flexing action of the resilient means.

The upper and lower edges l3 and it of the base of the bifurcation and the free ends I5, I 6 and ll of the resilient sections are preferably formed relatively straight transversely thereof so as to provide substantial line contact with each other and with the edge of the lens when .the lens holding means is moved about the lens connecting means I. The line contact of the resilient sections with each other and with the upper and lower edges of the bifurcated member obviates any tendency of the said resilient sections to twist about the connecting means or pin l2 during use, as the pressure of one resilient'member on the other is along a transverse line and has no tendency to cause the said resilient members to twist sidewise relative to each other as would be the case if a point contact were provided between said resilient means especially if the contact was to one side of i the longitudinal axis of said resilient means. This line contact relation therefore provides smoother acting resilient 'means which will haveno tendency to move out of aligned or stacked r during the flexing: H

' The pin i'r'ier'riber -or'connecting means l2, as shown in Figs IV and V, is preferably formed rectangular arid is adapted to be fitted within aligned rectangular openings formed in the superimposed resilient'sections 9, l0 and H. The pin v ation with each other is provided with a reduced projection l8 adjacent.

one end thereof adapted to be secured by solder or other suitable means in an opening formed in the body portion 2 of the lens strap. Adjacent securing them to the body portion 2 of the lens strap and eliminating all looseness and play in the connectiom The purpose of providing a rectangular pin l2, the greater width of which extends in the direction of the longitudinal axis of the superimposed sections, is to provide means ..whereby the width of the side portions 2| of the various resilient sections on the opposite sides of the connecting means I2 will not be so reduced as to cause them to be weakened to a degree wherein they will not provide a positive and per- 7 manent connection and permit the various resilient sections to function properly. The rectangular shaped pin l2 provides a longer bearing surface in a direction longitudinally of the resilient sections and thereby obviates any tendency of the resilient means being displaced sidewise out of relation with each other during use.

The portions l9 pressed into engagement with the beveled end walls 20 provide means for anchoring the resilient means in the direction of flexing and thereby provide a positive and durable attachment. This method of attaching the resilient means to the bodyportion of the lens holding means enables the spaced lens face engaging portions 4 to be adjusted to any desired spaced relation with each other, independently of the resilient means, to be fitted to lenses of varying thicknesses without danger of having the resilient sections move out of aligned-relation with each other as would be the case if a round pin were used and the inner walls of the spaced face engaging portions 4 were depended upon to hold the resilient sections in alignment. It is quite obvious that with the latter structure,-if the space between the lens-face engaging portions were increased, as happens when the lens holding means is i'itted to a thick lens, the inner walls of said face engaging portions would move away from the side edges of the resilient means with a result that the said resilient means would be free to twist about the connecting means out of aligned I relation with each other during use.

The various resilient sections 8, l and II are curved during the forming thereof so as to engage the edge of the lens only adjacent their ends with the central portions thereof adapted to be held in spaced relation with the lens. During the securing of the various resilient sections to the body portion 2, some dimculty was encountered in having the sections become straightened to such an extent that they would not prop erly flt the edge of the lens. To overcome this tendency of the resilient members to straighten during the attachment thereof to the body portion 2, the said body portion is cupped at its attaching face 22 in the direction of the longitudinal axis of the resilient means to a curvature whose radius is less than the radius of curvature of the edge of the lens at said location but substantially equal to the curvature desired of the resilient means. It is quite obvious that when the projections I! are pressed outwardly and rearwardly into engagement with the beveled recesses 20, the cupped face 22 forms backing means for the resilient means and prevents their straightening as would be the case if said face were flat or of a curvature greater in radius than the curvature desired of. the resilient means.

With this construction there will be more of a tendency to cause the resilient sections, if not already cupped to the curvature of the attaching face 22, to assume this curvature. This is brought about by the fact that the ends I9 of the attaching pin l2 lie within the outer limits of the edges I3 and II of the body portion 2 causing the pressure of the attaching operation to be concentrated within these limits and forcing the resilient means inwardly a given amount relative 'to a plane touching both of said edges 3 and I4.

' In Figures VI and VII, thereis shown amodifled form of the invention whereinthe ends 23 of the resilient means 24 nearest the edge of the lens are provided with cylindrical shaped surfaces contacting the edge of the lens. These cylindrical shaped ends function in a manner similar to the ends I! of the resilient means ll of Fig. II, only in this instance, instead of having a relatively sharp line contact transversely of the edge of the lens it has a curved face providing a line contact transversely of the edge of the lens,

which edge in the plane of the lens, is free to rock as the lens .holding means is moved about its .point of attachment to the lens. In this instance,

the body portion of the lens holding means is beveled rearwardly as indicated at 25 and 26 from points adjacent the opposite sides of the pin member 21 so as to provide a wider range of flexing of the resilient means. In this instance,

the resilient section 28 forming the backing means for the resilient section 29 is preferably cupped, as shown in Fig. VIII, in a direction transversely of its longitudinal axis to increase the rigidity of said resilient section; The object of this cupping is to provide means which during the securing of the various resilient sections to the body portion of the lens holding means by the pin member 21 is adapted to prevent a possible straightening of said resilient means.

Although the section 28 tends to prevent the straightening of the resilient sections 24 and 29 during the assembling operation with the lens holding means, it provides resilient backing means for said sections, which when in secured relation with the lens holding means permits of a wider range of resiliency.

It is apparent that although the resilient section24 is shown and described as being provided with upcurvedends 23 the said ends may beso shaped as to mave substantial surface contact with the edge of the lens, that is, the said ends may be so formed as to have a substantial portion thereof in intimate surface contact with the edge of the lens. This arrangement would provide means' for distributing possible strain which might be introduced at said locations during the flexing of the resilient means over a greater area thereby providing a more positive cushioning effect. It is apparent, however, that the line contact set forth in connection with the structure shown in Fig. 11 as compared with the prior-art point contact of the resilient means with the edge of the lens will greatly relieve the pressure strain at said ends. This in itself greatly reduces the tendency of the lenses to become broken due to strain of this nature durmovement in both directions by the resilient It is apparent that the spring sections 28 and 29 may also be provided with upcurved ends if desired.

It will be noted that the distance between the respective ends l5, l6 and ll of the-various resilient sections and the distance from the edges l3 and M from the respective ends I 01' the section 9 are all substantially equal. This is 'to provide staggered line contact supporting ends or edges at equally spaced intervals intermediate the ends of the resilient section II which during the flexing of said section will be successively brought into action to stabilize the flexing of said section throughout its length. The sections 9 and I0 resiliently ease off the flexing of the section I l and increase its tendency to return to its initial set after such easing ofl. This func-- tion takes place in either direction of the flexing; in one direction the upper sections perform the function and in the other direction the lower sections perform the function.

It will be noted that the distance between the ends of the various resilient sections 24, 28 and 29 and the distance between the upper and lower contacting edges 30 and 31 of the lens holding means with respect to the ends of the section 28 are substantially equal and tend to stabilize the flexing of the section 24 in a manner similar to the structure shown in Fig. III.

In Fig. IX there is shown another modified form of the invention wherein the resilient sections 32, 33 and 34 are connected to the overlying portion 35 of the lens holding means by spot welding, as indicated at 36. In this instance the pin I2 is not used and the resilient sections are' not perforated such as is the case when the pin type connectingmeans is used. It is obvious that the spot welding method may be used in any of the various structures shown. The spot welding is accomplished by the provision of a suitable apparatus of the conventional type having a contact engaging the springs in the vicinity wherein the welding operation is to be performed. This integrally joins the sections with each other and with the overlying portion 35 at the point 36. Care is taken that the spring sections and the lens holding means are in proper shock and strain absorbing means.

From the foregoing description it will be seen that I have provided simple, eflicient and economical means and methods of obtaining allot the objects and advantages of the invention.

Having described my invention, I claim:

1. In a device of the character described for attachment to a lens,said attachment having a portion adapted to overlie the edge of the lens and a lens connecting portion adapted to engage a face of the lens, said portion overlying the edge of the lens being relatively narrowin a direction following said edge and being provided with a surface which is curved in said direction to a radius which is less than the radius of curvature of the adjacent edge of the lens, a plurality of curved resilient members of varying lengths having aligned slots therein extending in the direction of the length of the resilient members and means fitting and extending through the slots and being headed over to overlie and secure the resilient members to the curved surface intermediate the upper and lower edges thereof with the adjacent resilient member curved substantially to the curve of said surface whereby the resilient member which is to engage the edge of the lens will be adapted to engage said edge at two spaced points at a substantial distance to each side of the portion overlying the edge of the lens and will be free to flex throughout the greater portion of its length during use, the means for securing said resilient members to the curved surface being adapted to maintain the said resilient members in surface contact with each other and with the curved surface adjacent the securing means and to urge the resilient members to cup to the curvature of said surface during use.

2. In a device of the character described for attachment to a lens, said attachment having a portion adapted to overlie the edge of the lens and a lens connecting portion adapted to engage a face of the lens, resilient means having an attaching opening intermediate its sides and the ends thereof which is greater in length in the direction of the longitudinal axis of said resilient means than in its width and means, also elongated in said direction, and shaped to fit and extend into said opening for securing the resilient means to the portion overlying the edge of the lens, said securing means having portions adjacent its opposed ends, only lying in the direction of the longitudinal axis of said resilient means, turned to overlie the adjacent edges of said resilient means on the side thereof which is adapted to be placed nearest the lens.

3. In a device of the character described for use in combination with a lens having a connecting opening therein comprising a portion adapted to overlie the edge of the lens and a portion adapted to overlie a face of the lens and be connected to the lens by securing means fitted in the opening therein and a plurality of resilient members of varying lengths secured intermediate their ends to said portion overlying the edge of the lens substantially intermediate the upper and lower edges of said portion, said portion overlying the edge of the lens being relatively narrow and having a concaved surface in a direction following the edge of said lens and of a radius less than the radius of the adjacent edge of the lens and having spaced relatively straight upper and lower edges extending transversely of the resilient means and providing substantially line contact with the adjacent resilient means when the attachment is moved on the lens about the lens securing means as a center, the length of said portion overlying the edge of the lens .being substantially equal to its width and such as to allow the resilient member adapted to engage the edge of the lens to flex substantially throughout the major portion thereof during use.

4. In a device of the character described for use in combination with a lens having 9. connecting opening therein, comprising a portion to overlie the edge of the lens and a portion adapted to "overlie a face of the lens and be connected to said portion and in surface contact with said portion, said portion overlying the edge of the lens being relatively short in a direction following said edge and having spaced relatively straight upper and lower edges extending transversely oi" the resilient means and providing substantially line contact with the adjacent resilient means when the device is moved on the lens about the lens securing means as a center, said resilient members having relatively straight transversely extending end portions providing substantially line contact with each other and with the edge of the lens during said movement, said variousline contacts being spaced substantially equal relative to each other in a direction longitudinally of the resilient means, and said portion overlying the edge of the lens being of a 'length substantially equal to its width and such as to permit the resilient member which is adapted to engage the edge of the lens to flex substantially throughout the major portion of the length thereof.

5. In a device of the character described for use in combination with a lens having a connecting opening therein comprising a portion adapted to overlie the edge of the lens and a portion adapted to, overlie a face of the lens and be connected to the lens by securing means fitted in the opening therein and a plurality of continuously curved resilient members secured intermediate their ends to said portion overlying the edge of the lens by a headed pin member which holds the resilient members in. surface contact with each other and with the portion overlying the edge of the lens adjacent the securing means, and intermediate the upper and lower edges of said portion, said portion overlying the edge of the lens being relatively narrow in a direction following the edge of said lens and having spaced relatively straight upper and lowered'g'e's extending transversely of the resilient means and providing substantially line contact with the adjacent resilient means when the attachment is moved on the lens about the lens securing means as a center, the length of said portion overlying the edge of the lens being substantially equal to its width and such as to allow the resilient member adapted to engage the edge of the lens to flex substantially throughout the major portion thereof during use.

6; In a device of the character described for attachment to a lens, said attachment having a portion adapted to overlie the edge of the lens and a lens connecting portion adapted to engage a face of the lens, said portion overlying the edge of the lens being relatively narrow in a direction which is to follow said edge and being provided with a surface which is c'upped in said direction, curved resilient means having a slot therein extending in the direction of the length of said resilient means and means fitting and extending through the slot and being headed over to overlie and secure the resilient means to the cupped surface intermediate the upper and lower edges thereof with the resilient means cupped substantially to the shape of the cupped surface whereby the resilient means will be adapted to engage the edge of a lens at two spaced points at a substantial distance to each side of the portion overlying the edge of the lens and will be free to flex throughout the greater portion of its length durming use, the means for securing said resilient means to the cupped surface being adapted to urge and maintain the resilient means in surface contact with said surface.

'7. In a device of the character described for attachment to a lens, said attachment having a portion adapted to overlie the edge of the lens and a lens connecting portion adapted to engage.

a face of the lens, resilient means, and means for securing said resilient means to said portion overlying the edge of the lens, said portion which is adapted to overlie the'edge of the lens being relatively narrow in a direction following said edge and having spaced relatively straight edges extending transversely of the resilient means and having a surface which is cupped only in the direction which is to follow the edge of the lens, on which the resilient means are held by said means for securing said resilient means to said cupped surface, said securing means being located intermediate said spaced relatively straight edges and being adapted to urge and maintain said resilient means in cupped surface contact with the cupped surface of said overlying edge portion.

8. In a device of the character described for attachment to a lens, said attachment having a portion adapted to overlie the edge of the lens and a lens connecting portion adapted to engage a face of the lens, resilient means having an opening therein, and rectangular pin-like means for longitudinal axis of the resilient means so as to overlie said resilient means only on said opposed sides. I

9: The method of forming a lens attachment comprising forming a member having a portion adapted to overlie the edge of the lens and a portion adapted to overlie a face of the lens, providing said portion adapted to overlie the edge of the lens with a surface cupped in the direction which is to lie in a direction following the edge of the lens, providingsaid surface with a projection, placing resilient means having an opening therein on said projection, and deflecting opposedportions of said projection lying in the direction of the longitudinal axis of the resilient means so as to overlie said resilient means only in said direction and so as to urge said resilient means to the shape of, said cupped surface and to retain the same in substantially intimate contact with said surface.

10. The method of securing together the separableparts of an ophthalmic mounting, comprising forming a member having a portion adapted to overlie the edge of a lens and 9. portion adapted to overlie a face of said lens, providing said portion adapted to overlie the edge of the lens with a surface cupped in the direction which is to lie in a direction following the edge of the lens, providing said surface with a projection, placing resilient means having, an opening therein on said projection, and deflecting opposed portions of said projection lying in the direction of the longitudinal axis of the re silient means so as to overlie said resilient means only in said direction and so as to urge said resilient means to the shape of said cupped surface and to retain the same in substantially intimate contact with said surface, placing said memher on a lens with the resilient means engaging edge of the lens and a lens connecting portion engaging a face of the lens, said portion overlying the edge of the lens being relatively narrow in a direction following said edge and being provided with a surface which is curved in said direction to a radius which is less than the radius of curvature of the adjacent edge of the lens, a

plurality of curved resilient members of varying lengths having aligned slots therein extending in the direction of the length of the resilient members and means fitting and extending through the slots and being headed over to overlie and secure the resilient means to the curved surface intermediate the upper and lower edges thereof with the adjacent resilient member curved substantially to the curve of said surface whereby the resilient member which is to engage the edge of the lens will be adapted to engage said edge at two spaced points at a substantial distance to each side of the portion overlying the edge of the lens and will be free to flex throughout the greater portion of its length during use, the

means for securing said resilient members to the curved surface being adapted to maintain the said resilient members in substantial surface contact with each other and with the curved surface adjacent the securing means and to urge the resilient members to cup substantially to the curvature of said surface during use.

12. In an ophthalmic mounting, a lens having a connecting opening therein, a lens holding member having a portion overlying the edge of the lens and a portion overlying a face of the lens and connected to the lens by securing means fitted in the opening therein, and having a plurality of resilient members of varying lengths secured intermediate their ends to said portion overlying the edge of the lens substantially intermediate the upper and lower edges of said portion, said portion overlying the edge of the lens being relatively narrow and having a concave surface in a direction following the edge of said lens and of a radius less than the radius of the adjacent edge of the lens and having spaced relatively straight upper and lower edges extending transversely of the resilient means and providing substantial line contact with the adjacent resilient means when the lens holding member is moved on the lens about the lens securing means as a center, the lengthof said portion overlying the edge of the lens being substantially equal to its width and such as to allow the resilient member engaging the edge of the lens to flex substantially throughout the major portion thereof during use.

13. In an ophthalmic mounting, a lens having a connecting opening therein, a lens holding member having a portion overlying the edge of the lens and a portion overlying the face of the lens and connected to said lens by securing means fitted in the opening therein and a plurality of continuously curved resilient members secured intermediate their ends to said portion overlying the edge of the lens and intermediate the upper .and lower edges of said portion by a headed pin member which holds the resilient members in substantially surface contact with each other and with the portion overlying the edge of the lens adjacent the securing means, said portion overlying the edge of the lens being relatively narrow in a direction following the edge of said lens and having spaced relatively straight upper and lower edges extending transversely of the resilient means and providing substantially line contact with the adjacent resilient means when the lens holding member is moved on the lens about the securing means as a center, the length of said portion overlying the edge of the lens being substantially equal to its width and such as to allow the resilient member engaging the edge of the lens to flex substantially throughout the major portion thereof during use.

14. In an ophthalmic mounting, a lens, a lens holding member having a portion overlying the edge of the lens and a portion overlying a faceof the lens and connected thereto, resilient means having an opening therein, and rectangular pin like means for securing said resilient means to said portion overlying the edge of the lens, said securing means extending through the opening in said resilient means and being headed over only on the opposed sides thereof lying in the direction of the longitudinal axis of the resilient means so as to overlie said resilient means only on said opposed sides.

EDWARD M. SPLAJNE. 

